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Introduce string_length() and string_width().

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This commit is contained in:
Xavier G 2016-05-13 02:47:26 +02:00
parent 21c07c0060
commit 35b3ccc6a4
2 changed files with 43 additions and 0 deletions
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34
src/core/utf8.c
View File

@ -55,3 +55,37 @@ int string_policy(const char *str)
}
return TREAT_STRING_AS_BYTES;
}
int string_length(const char *str, int policy)
{
g_return_val_if_fail(str != NULL, 0);
if (policy == -1) {
policy = string_policy(str);
}
if (policy == TREAT_STRING_AS_UTF8) {
return g_utf8_strlen(str, -1);
}
else {
/* Assume TREAT_STRING_AS_BYTES: */
return strlen(str);
}
}
int string_width(const char *str, int policy)
{
int len;
g_return_val_if_fail(str != NULL, 0);
if (policy == -1) {
policy = string_policy(str);
}
len = 0;
while (*str != '\0') {
len += string_advance(&str, policy);
}
return len;
}

9
src/core/utf8.h
View File

@ -33,6 +33,15 @@ int string_advance(char const **str, int policy);
*/
int string_policy(const char *str);
/* Return the length of the str string according to the given policy; if policy
* is -1, this function will call string_policy().
*/
int string_length(const char *str, int policy);
/* Return the screen width of the str string according to the given policy; if
* policy is -1, this function will call string_policy().
*/
int string_width(const char *str, int policy);
#define unichar_isprint(c) (((c) & ~0x80) >= 32)
#define is_utf8_leading(c) (((c) & 0xc0) != 0x80)